16855149 has 4 divisors (see below), whose sum is σ = 22473536. Its totient is φ = 11236764.

The previous prime is 16855133. The next prime is 16855151. The reversal of 16855149 is 94155861.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 16855149 - 2⁴ = 16855133 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16855129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2809189 + ... + 2809194.

It is an arithmetic number, because the mean of its divisors is an integer number (5618384).

Almost surely, 2^16855149 is an apocalyptic number.

It is an amenable number.

16855149 is a deficient number, since it is larger than the sum of its proper divisors (5618387).

16855149 is an equidigital number, since it uses as much as digits as its factorization.

16855149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5618386.

The product of its digits is 43200, while the sum is 39.

The square root of 16855149 is about 4105.5022835215. The cubic root of 16855149 is about 256.3957755524.

The spelling of 16855149 in words is "sixteen million, eight hundred fifty-five thousand, one hundred forty-nine".